Fourier transform 說明_中文 (好文)

http://blog.xuite.net/lapuda.chen/PaulBlog/221866406-%E5%A6%82%E6%9E%9C%E7%9C%8B%E4%BA%86%E6%AD%A4%E6%96%87%E4%BD%A0%E9%82%84%E4%B8%8D%E6%87%82%E5%82%85%E9%87%8C%E8%91%89%E8%AE%8A%E6%8F%9B(Fourier+Transform)%EF%BC%8C%E9%82%A3%E5%B0%B1%E9%81%8E%E4%BE%86%E6%8E%90%E6%AD%BB%E6%88%91%E5%90%A7!